gdeptrace dependancy solver correct for pkg or make deps

Description

gdeptrace sorts an input dependancy list or table and prints it, and can do other actions. It's default operation is to act like tsort (1) except that it sorts by pure pkg / make dependancy (tsort sorts by grapical topology: see notes about differences).

EXAMPLE:

$ echo -e "b e\ne\nc b" | sort -k1,1 | gdeptrace [opts]
e
b
c

(b depends on e, c depends on b, e has no depends)

(also: e has more items depending on it and is below anything it depends on; in this case the top, all and only by the rules known and given, in order by given where equal)

$ echo -e "b e\ne\nc b" | depsort
ditto, no opts needed

$ libdeps objdump /lib/*.so.*
(outputs if missing, load order (deps), rdeps, which are effected by missing lib/s, etc, see readme)